GB2197882A - Light transmitting glazing pane - Google Patents

Light transmitting glazing pane Download PDF

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Publication number
GB2197882A
GB2197882A GB08724203A GB8724203A GB2197882A GB 2197882 A GB2197882 A GB 2197882A GB 08724203 A GB08724203 A GB 08724203A GB 8724203 A GB8724203 A GB 8724203A GB 2197882 A GB2197882 A GB 2197882A
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GB
United Kingdom
Prior art keywords
pane
coating
low emissivity
pane according
face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08724203A
Other versions
GB8724203D0 (en
GB2197882B (en
Inventor
Jean-Francois Thomas
Jean Roucour
Robert Terneu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGC Glass Europe SA
Original Assignee
Glaverbel Belgium SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Glaverbel Belgium SA filed Critical Glaverbel Belgium SA
Publication of GB8724203D0 publication Critical patent/GB8724203D0/en
Publication of GB2197882A publication Critical patent/GB2197882A/en
Application granted granted Critical
Publication of GB2197882B publication Critical patent/GB2197882B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10018—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising only one glass sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
    • C03C17/23—Oxides
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B60J1/002—Windows; Windscreens; Accessories therefor with means for clear vision, e.g. anti-frost or defog panes, rain shields
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/20—Materials for coating a single layer on glass
    • C03C2217/21—Oxides
    • C03C2217/211—SnO2
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/20—Materials for coating a single layer on glass
    • C03C2217/21—Oxides
    • C03C2217/212—TiO2
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/20—Materials for coating a single layer on glass
    • C03C2217/21—Oxides
    • C03C2217/23—Mixtures
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/20—Materials for coating a single layer on glass
    • C03C2217/21—Oxides
    • C03C2217/24—Doped oxides
    • C03C2217/241—Doped oxides with halides
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2218/00—Methods for coating glass
    • C03C2218/30—Aspects of methods for coating glass not covered above
    • C03C2218/365—Coating different sides of a glass substrate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Surface Treatment Of Glass (AREA)
  • Paints Or Removers (AREA)

Description

2197882 1 LIGHT TRANSMITTING GLAZING PANE This invention relates to a
light transmitting glazing pane comprising at least one sheet of coated glass. This invention has particular. but not exclusive, reference to glazing panels intended for installation as vehicle windows, for example windows of trains, ships or aircraft, and especially windows of road vehicles. Although the invention is applicable to coated glazing panels generally, the particular problem to be solved by this invention is especially noteworthy in the case of road vehicles, and accordingly the following description of the invention and its advantages will lie mainly in that context.
it is well known that if a vehicle is left in an unshaded position during a warm sunny day, the interior of the vehicle can soon become uncomfortably or even dangerously hot. There are indeed cases on record where animals left in parked motor cars have died from heatstroke, even in countries with temperate climates. It is desirable therefore to limit the solar energy gain of a vehicle in order to reduce such overheating. A principal source of this solar energy gain takes place through the vehicle windows.
It is well known to provide solar screening panels for buildings, and in fact this is an increasing feature of modern architectural practice. But known glazing panels of that kind are always intended to serve a second purpose, namely to screen off a high proportion of visible radiation in order to cut down glare within the building. For example, double glazing panels are known which have a visible light transmittance of 49% and a total solar radiant heat transmittance of 42%. Such panels are not suitable for many purposes where a high visible light transmissivity is required, as is I- ' - J 2 the case in particular with road vehicle windscreens. It is a legal requirement in some countries that the visible light transmissivity of a road vehicle windscreen should be at least 70%.
It is an object of the present invention to provide a glazing pane which could, if suitably sized and shaped, be used as a vehicle window, and which presents favourable properties as regards a good visible light transmissivity and a low total solar energy transmissivity.
According to the present invention, there is provided a light transmitting glazing pane comprising at least one sheet of coated glass. characterised in that such pane comprises a first coating on an exposed glass face thereof which reduces the emissivity of that face in respect of infra-red radiation having wavelengths in excess of 3pm, and on the or an other face of the pane a solar radiation screening coating which is adapted to screen short wavelength inEra-red radiation, the thickness of each coating being selected so that the pane has a visible light transmissivity of at least 70% and a total solar radiant energy transmissivity of at most -75%.
It will be appreciated that the effectiveness of the pane will in some measure depend upon the side thereof on which energy is incident. For the best results, the low emissivity coating should be inboard of the solar screening coating, so that of those two coatings, the solar screening coating is first to intercept solar radiation. In this way, any energy absorbed by the pane. and especially by the solar screening coating, due to incident radiation which tends to heat the pane, will be preferentially re-radiated towards the outside due to the presence of the low emissivity coating. In the remainder of this description, unless the context requires otherwise, it will be assumed that the low emissivity coating faces away from the radiation source.
Such a glazing pane has high visible light transmissivity, and good solar energy screening properties, and being a pane, it can be made to a suitable size and shape for incorporation into a vehicle for use as a window thereof. for example a front or rear windscreen, a side window or a roof light. whether openable or not.
Advantageously, the pane has a visible light transmissivity of at least 75%, so as to allow better visibility therethrough. Such a pane may. f or example, be constituted as a vehicle window such as a windscreen for use even in countries whose regulations require very high visible light transmission through vehicle windows.
0 1 '1 5, ___j 111 1 3 Also in order to promote visibility through the pane, it is particularly preferred that the pane has a visible light absorbency of not more than 3%.
In preferred embodiments of the invention, such low emissivity coating is a tin oxide coating. Tin oxide coatings can be very effective in reducing the emissivity of the coated sheet face while at the same time having a good abrasion resistance and resistance to attack by the atmosphere. so not detracting from a long useful life for the coated pane.
Advantageously, such low emissivity coating is a fluorine-doped tin oxide coating. We have found that such coatings can be a highly effective compromise between achieving a good low emissivity for infra-red radiation while still allowing good visible light transmission.
Preferably, such low emissivity coating has a thickness in the range 350nm to 150nm. For a given coating composition, thicknesses within such a range have been found to present the most favourable compromise between on the one hand low infra-red emissivity and good abrasion resistance which are both promoted by increase in the coating thickness, and on the other hand a high visible light transmissivity. The extent to which light is absorbed in a coating of given composition will increase with the thickness of the coating, but it is also necessary to take account of the interference effect of light which Is reflected at the faces of the coating. For maximum tranonilooivity of light of a given wavelength, the thickness of the coating multiplied by the refractive index of the coated material should be equal to one half of that wavelength.
Coatings having a said thickness in the range 350nm to 15Onm have a further advantage in that there is a rather low tendency for them to present disagreeable coloration in reflection due to interference effects. it is especially preferred that the coated pane has a colour purity of not more than 10% and preferably not more than 6%, so that it presents a neutral aspect. This is a very important consideration for panes for use as vehicles glazings. It helps to avoid distractions to the driver and any risk that the driver might mistake the colour of a traffic control sign or signal.
In order to promote low solar energy transmissivity, it is preferred that such low emissivity coating imparts to the coated face an emissivity factor In respect of infra-red radiation having wavelengths in excess of 3pm of at most 0.50, and preferably of less than 0.35.
The aims of the invention are especially promoted by highly efficient 1' 1- J 4 low emissivity coatings. It is desirable that such coatings should have a good low emissivity, but also that they should be sufficiently thin as not to reduce visible light transmission by too great an extent. We have found that these aims are promoted when, as is preferred, such low emissivity coating has an emissivity factor and a thickness (when expressed in nanometres) which are such that their product is not more than 110, and is preferably not more than 90.
In some preferred embodiments of the invention, said pane is constituted as a laminate in which a said glass sheet is bonded to at least one other sheet via intervening adhesive material. Laminated panes afford advantages from the safety point of view. especially when used as vehicle windscreens. Also, it is in general easier to form one coating (lowemissivity or solar radiation screening) on each of two sheets than it is to form both coatings on the same sheet. A further advantage of the use of a laminate is that it enables the solar radiation screening coating to be located within the thickness of the laminate where it will be protected against abrasion in use.
The said solar radiation screening coating could be constituted as an energy absorbing coating, but the use of such coatings tends to increase the temperature of the panel under given incident radiation conditions thus leading to an increased reradlation of infra red energy by the panel, and such coatings also tend to be Inherently absorptive of visible light. it is therefore preferable that said solar radiation screening coating is a reflective coating deposited on the other exposed face of the pane. Such a coating can have a greater visible light transmissivity, and its solar screening effect does not entail so much heating of the coated pane. Such a coating may also be useful in masking any unsightly interference coloration effects which may be present due to the low emissivity coating.
Advantageously, said reflective coating comprises titanium dioxide. Coatings containing titanium dioxide can form highly efficient energy reflecting screens. Such a coating may for example comprise a mixture of tin and titanium dioxides.
Preferably, said reflective coating has a thickness in the range 20nm to 350nm. The actual thickness to be selected will depend on the desired properties of the coating, bearing in mind the desirability of satisfactory visible light transmissivity coupled with efficient energy screening and suitable abrasion resistance. A mixed tin and titanium dioxide coating can he particularly beneficial in this respect, since firstly, such a coating C-, 1 has an inherently greater abrasion resistance than a coating of pure titanium dioxide, and secondly, it has a lower refractive index than a coating of pure titanium dioxide so that for the same solar energy transmission properties it can be made thicker and thus more abrasion resistant.
Windows for installation in vehicles of various sorts are often curved. and the present invention accordingly includes a pane as hereinbefore defined which is curved so as to have one convex main face and one concave main face.
We have already stated that the effectiveness of the pane will in some measure depend upon the side thereof on which energy is incident, and that for the best results, the low emissivity coating should be inboard of the solar screening coating, so that of those two coatings, the solar screening coating is first to intercept solar radiation. Since such curved panes are most usually installed with their concave faces facing inwardly when used as vehicle windows, it is preferred that the low emissivity coating is located on the concave main face of the pane.
The invention also includes a pane as hereinbefore defined which is mounted in a vehicle with its low emissivity coating directed towards the interior of the vehicle.
The invention further extends to a motor vehicle equipped with at least one window formed by a pane as hereinbefore defined.
various Preferred embodiments of the invention will now be described in greater detail with reference to the accompanying diagrammatic drawing which shows a pane according to the invention mounted as a road vehicle windscreen, and by way of Example.
In the drawing, a vehicle window generally indicated at 100 comprises a sheet 101 of glass which bears a coating 102 which reduces the emissivity of the coated f ace in respect of infra-red radiation having wavelengths in excess of 3pm. The uncoated face of the glass sheet 101 is bonded via an adhesive layer (not shown) to a second sheet 103. That second sheet 103 bears on its exposed face a second coating 104. That second coating 104 is adapted to screen short wavelength infra-red radiation. The thickness of each coating 102. 104 is selected so that the pane has a visible light transmissivity of at least 70% and a total solar radiant energy transmissivity of at most 75%.
The pane 100 is curved so that it has one convex face and one concave f ace. The low emissivity coating 102 is on the concave face. The pane is 6 mounted as a road vehicle windscreen in a recess 105 of a vehicle body 106 and is bonded to the vehicle body by adhesive 107 with the low emissivity coating 102 facing the inside of the vehicle.
In a variant, the pane 100 comprises a single sheet of glass which is coated on each of its faces.
In another variant, the or each sheet of glass used is chemically tempered. Alternatively, the glass may be thermally tempered.
EXAMPLES
In the Examples various coatings are applied pyrolytically to the two faces of soda-lime sheet glass which is 4mm in thickness. The coatings are as follows.
Low Emissivity Coating A. sheets of pyrolytically coated with a fluorine-doped thickness of 330nm, and an emissivity of radiation having wavelengths in excess of 3pm.
Low Emissivity Coating B. Sheets of pyrolytically coated with a fluorine-doped thickness of 260nm, and an emissivity of radiation having wavelengths in excess of 3pm.
Low Emissivity Coating C. Sheets of pyrolytically coated with a fluorine-doped thickness of 20Onm, and an emissivity of radiation having wavelengths in excess of 3pm Solar Radiation Screenina Coating A.
glass 4mm in thickness are tin dioxide coating having a 0.25 in respect of infra-red glass 4mm in thickness are tin dioxide coating having a 0.30 in respect of infra-red glass 4mm in thickness are tin dioxide coating having a 0.50 in respect of infra-red Sheets of glass bearing a low emissivity coating as exemplified above are pyrolytically coated to a thickness of 20nm, the coating being composed substantially entirely of titanium dioxide.
Solar Radiation Screening Coating B. Sheets of glass bearing a low emissivity coating as exemplified above are pyrolytically coated to a thickness of 20nm, the coating being composed of titanium dioxide 70% by volume. and tin dioxide 30% by volume.
Solar Radiation Screening Coating C. Sheets of glass bearing a low emissivity coating as exemplified above are pyrolytically coated to a thickness of 20nm, the coating being composed of titanium dioxide 30% by volume. and tin dioxide '70% by volume.
Solar Radiation Screening Coating D. Sheets of glass bearing a low emissivity coating as exemplified above are pyrolytically coated to a thickness of 320nm, the coating being composed substantially entirely of l- I,- - I- 1 t 7 titanium dioxide.
Solar Radiation Screening Coating E. Sheets of glass bearing a low emissivity coating as exemplified above are pyrolytically coated to a thickness of 320m, the coating being composed of titanium dioxide 70% by volume, and tin dioxide 30% by volume.
Solar Radiation Screening Coating F. Sheets of glass bearing a low emissivity coating as exemplified above are pyrolytically coated to a thickness of 160run, the coating being composed of titanium dioxide 30% by volume, and tin dioxide 70% by volume.
Solar Radiation Screening Coating G. Sheets of glass bearing a low emissivity coating as exemplified above are pyrolytically coated to a thickness of 320rim, the coating being composed of titanium dioxide 30% by volume, and tin dioxide 70% by volume.
The various coated sheets were then illuminated using C.I.E. Illuminant D, incident on the face bearing the solar radiation screening coating, and various properties of the coated sheets were measured as follows.
EX., LOW SOLAR EMISSIVITY SCREENING VISIBLE LIGHT TOTAL ENERGY VISIBLE LIGHT COLOUR COATING COATING TRANSMISSIVITY TRANSMISSIVITY ABSORBENCY PURITY 1 A A 73.2% 70.3% 2.5% 5.5% 2 B A '74.7% 70.6% 2.5% 4.5% 3 c A 7 1. 0% 71.4% 2.6% 5.3% 4 A B -16.5% 72.6% 2.6% 4.0% B B 78.2% '72.8% 2.6% 3.0% 6 c B '74. 1% 73.6% 2.7% 3.7% 7 A c '79.1% 73.3% 2.7% 2.9% 8 B c 81.0% 74.5% 2.7% 1.9% 9 B D 72.2% 66.0% 2.8% 5.0% B E 71.0% 68.0% 2.8% 4.7% 11 A F 76.3% 70.1% 2.9% 9.4% 12 B F 77.5% 70.0% 2.8% 8.0% 13 A G '72.6% 69.3% 3.0% 6.4% 14 B G 73.8% 69.3% 3.0% 1.5% The values for colour purity were obtained using C.I.E. Illuminant C.
r k -- 1 8

Claims (1)

1. A light transmitting glazing pane comprising at least one sheet of coated glass, characterised in that such pane comprises a first coating on an exposed glass face thereof which reduces the emissivity of that face in respect of infra-red radiation having wavelengths in excess of 3pm, and on the or an other face of the pane a solar radiation screening coating which is adapted to screen short wavelength infra-red radiation. the thickness of each coating being selected so that the pane has a visible light transmissivity of at least 70% and a total solar radiant energy transmissivity of at most 75%.
2. A pane according to claim 1, wherein the pane has a visible light transmissivity of at least 75%.
3. A pane according to claim 1 or 2, wherein the pane has a visible light absorbency of not more than 3%.
4. A pane according to any preceding claim, wherein such low emissivity coating is a tin oxide coating.
5. A pane according to claim 4, wherein such low emissivity coating is a fluorine-doped tin oxide coating.
6. A pane according to any preceding claim, wherein such low emissivity coating has a thickness in the range 350nm to 150nm.
7. A pane according to any preceding claim, wherein the coated pane has a colour purity of not more than 10% and preferably not more than 6%.
A pane according to any preceding claim, wherein such low emissivity coating imparts to the coated face an emissivity factor in respect of infra-red radiation having wavelengths in excess of 3pm of at most 0.50.
k 9 9. Apane according to any preceding claim, wherein such low emissivity coating has an emissivity factor and a thickness (when expressed in nanometres) which are such that their product is not more than 110, and is preferably not more than 90.
10. A pane according to any preceding claim. wherein said pane is constituted as a laminate in which a said glass sheet is bonded to at least one other sheet via intervening adhesive material.
11. A pane according to any preceding claim, wherein said solar radiation screening coating is a reflective coating deposited on the other exposed face of the pane.
12. A pane according to claim 11. wherein said reflective coating comprises titanium dioxide.
13. A pane according to claim 11 or 12, wherein said reflective coating has a thickness in the range 20= to 350nm.
14. A pane according to any preceding claim, wherein the pane is curved so as to have one convex main face and one concave main face.
is. A pane according to claim 14, wherein the low emissivity coating is located on the concave main face of the pane.
16. A pane according to any preceding claim which is mounted in a vehicle with its low emissivity coating directed towards the interior of the vehicle.
17. A motor vehicle equipped with at least one window formed by a pane according to any preceding claim.
1
GB8724203A 1986-10-16 1987-10-15 Light transmitting glazing pane Expired - Lifetime GB2197882B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB868624826A GB8624826D0 (en) 1986-10-16 1986-10-16 Light transmitting glazing pane

Publications (3)

Publication Number Publication Date
GB8724203D0 GB8724203D0 (en) 1987-11-18
GB2197882A true GB2197882A (en) 1988-06-02
GB2197882B GB2197882B (en) 1991-06-26

Family

ID=10605850

Family Applications (2)

Application Number Title Priority Date Filing Date
GB868624826A Pending GB8624826D0 (en) 1986-10-16 1986-10-16 Light transmitting glazing pane
GB8724203A Expired - Lifetime GB2197882B (en) 1986-10-16 1987-10-15 Light transmitting glazing pane

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB868624826A Pending GB8624826D0 (en) 1986-10-16 1986-10-16 Light transmitting glazing pane

Country Status (12)

Country Link
US (1) US4968563A (en)
JP (1) JP2709595B2 (en)
BE (1) BE1001487A3 (en)
CH (1) CH677227A5 (en)
DE (1) DE3734982C2 (en)
ES (1) ES2008909A6 (en)
FR (1) FR2605308B1 (en)
GB (2) GB8624826D0 (en)
IT (1) IT1211397B (en)
LU (1) LU87020A1 (en)
NL (1) NL194548C (en)
SE (1) SE463768B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6939611B2 (en) 1994-10-31 2005-09-06 Kanagawa Academy Of Science And Technology Window glass employing titanium dioxide photocatalyst

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5308706A (en) * 1988-07-27 1994-05-03 Nippon Sheet Glass Co., Ltd. Heat reflecting sandwich plate
CA2039109A1 (en) * 1990-04-23 1991-10-24 David B. Chang Selective emissivity coatings for interior temperature reduction of an enclosure
GB9121581D0 (en) * 1991-10-11 1991-11-27 Caradon Everest Ltd Fire resistant glass
EP0600054B1 (en) * 1992-05-19 1998-08-05 Lockheed Martin Corporation Rf-transparent antenna sunshield membrane
DE4325011A1 (en) * 1993-07-28 1995-03-02 Herlitz Michael Extension of antireflection coating, as usual for spectacle glasses, to automobile windscreens and further motor vehicles and means of transportation, and all other silicate and plastic sheets
GB2280699A (en) * 1993-08-05 1995-02-08 Caradon Everest Ltd Coated sheet glass and insulated glazing units
US6231971B1 (en) * 1995-06-09 2001-05-15 Glaverbel Glazing panel having solar screening properties
WO1997025201A1 (en) * 1996-01-11 1997-07-17 Libbey-Owens-Ford Co. Coated glass article having a solar control coating
US5750265A (en) * 1996-01-11 1998-05-12 Libbey-Owens-Ford Co. Coated glass article having a pyrolytic solar control coating
BE1012766A3 (en) * 1999-06-30 2001-03-06 Glaverbel In particular for motor glass roof.
DE20009862U1 (en) 2000-05-31 2000-08-17 Dr.Ing.H.C. F. Porsche Ag, 70435 Stuttgart Translucent pane for a motor vehicle
DE10249263B4 (en) 2002-10-23 2004-12-09 Daimlerchrysler Ag Laminated glass with thermal comfort effect and their use
EP1644293B2 (en) 2003-07-11 2022-04-13 Pilkington Group Limited Solar control glazing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB989555A (en) * 1961-04-05 1965-04-22 Corning Glass Works Glass sheet for use in structural closure members

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1336559A (en) * 1970-05-20 1973-11-07 Triplex Safety Glass Co Metal oxide coatings
BE787599A (en) * 1971-08-16 1973-02-16 Battelle Memorial Institute ANTISOLAR FILTERING AND THERMAL INSULATION GLASS
DE2544245C3 (en) * 1975-10-03 1981-12-17 Röhm GmbH, 6100 Darmstadt Infrared reflective glazing material
US4146657A (en) * 1976-11-01 1979-03-27 Gordon Roy G Method of depositing electrically conductive, infra-red reflective, transparent coatings of stannic oxide
US4377613A (en) * 1981-09-14 1983-03-22 Gordon Roy G Non-iridescent glass structures
JPS5931147A (en) * 1982-08-17 1984-02-20 株式会社豊田中央研究所 Visible-ray transmitting heat wave shielding membrane and its manufacture
GB2136316B (en) * 1983-03-17 1986-05-29 Glaverbel Coated glazing materials
FR2550138B1 (en) * 1983-08-04 1985-10-11 Saint Gobain Vitrage LOW EMISSIVITY GLAZING, ESPECIALLY FOR VEHICLES
JPS6081047A (en) * 1983-10-06 1985-05-09 Toyota Motor Corp Window glass for electromagnetic shielding
JPS60252301A (en) * 1984-05-29 1985-12-13 Asahi Glass Co Ltd Optical body having improved heat resistance
DE3583707D1 (en) * 1984-06-26 1991-09-12 Asahi Glass Co Ltd TRANSPARENT HEAVY DIRTING ITEM WITH LOW REFLECTION.
US4743506A (en) * 1984-12-28 1988-05-10 M&T Chemicals Inc. Tin oxide coated article
GB2174412B (en) * 1985-03-28 1988-11-09 Glaverbel Transparent glazing panels
GB8508092D0 (en) * 1985-03-28 1985-05-01 Glaverbel Transparent glazing panels
US4600654A (en) * 1985-05-14 1986-07-15 M&T Chemicals Inc. Method of producing transparent, haze-free tin oxide coatings
JPH0517233Y2 (en) * 1987-07-10 1993-05-10

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB989555A (en) * 1961-04-05 1965-04-22 Corning Glass Works Glass sheet for use in structural closure members

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6939611B2 (en) 1994-10-31 2005-09-06 Kanagawa Academy Of Science And Technology Window glass employing titanium dioxide photocatalyst
US7157840B2 (en) 1994-10-31 2007-01-02 Kanagawa Academy Of Science And Technology Illuminating devices employing titanium dioxide photocatalysts
US7327074B2 (en) 1994-10-31 2008-02-05 Kanagawa Academy Of Science And Technology Illuminating devices employing titanium dioxide photocatalysts

Also Published As

Publication number Publication date
FR2605308A1 (en) 1988-04-22
LU87020A1 (en) 1988-05-03
JPS63103844A (en) 1988-05-09
GB8724203D0 (en) 1987-11-18
FR2605308B1 (en) 1992-05-22
JP2709595B2 (en) 1998-02-04
ES2008909A6 (en) 1989-08-16
NL194548C (en) 2002-07-02
CH677227A5 (en) 1991-04-30
NL194548B (en) 2002-03-01
IT1211397B (en) 1989-10-18
DE3734982A1 (en) 1988-04-21
SE8704021D0 (en) 1987-10-15
BE1001487A3 (en) 1989-11-14
NL8702477A (en) 1988-05-16
DE3734982C2 (en) 2000-05-31
GB2197882B (en) 1991-06-26
GB8624826D0 (en) 1986-11-19
SE463768B (en) 1991-01-21
SE8704021L (en) 1988-04-17
US4968563A (en) 1990-11-06
IT8767857A0 (en) 1987-10-13

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